use a shared timeout for service re-announcements
use a shared timeout for service re-announcements


git-svn-id: fdf0ecc2a4e39a3a375229966361e029d8cd3665@137 d8cb91d7-bff9-0310-92b9-80b65e4482b2

GNOME/gssdp,GNOME/gssdp,GNOME/gssdp